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https://github.com/RobTillaart/Arduino.git
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56 lines
957 B
C++
56 lines
957 B
C++
//
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// FILE: I2Ckeypad_keymap.ino
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// AUTHOR: Rob Tillaart
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// PURPOSE: demo key mapping
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// URL: https://github.com/RobTillaart/I2CKeyPad
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//
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// PCF8574
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// pin p0-p3 rows
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// pin p4-p7 columns
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// 4x4 or smaller keypad.
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#include "Wire.h"
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#include "I2CKeyPad.h"
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const uint8_t KEYPAD_ADDRESS = 0x38;
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I2CKeyPad keyPad(KEYPAD_ADDRESS);
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char keymap[19] = "123A456B789C*0#DNF"; // N = NoKey, F = Fail
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void setup()
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{
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Serial.begin(115200);
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Serial.println(__FILE__);
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Wire.begin();
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Wire.setClock(400000);
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if (keyPad.begin() == false)
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{
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Serial.println("\nERROR: cannot communicate to keypad.\nPlease reboot.\n");
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while (1);
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}
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keyPad.loadKeyMap(keymap);
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}
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void loop()
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{
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if (keyPad.isPressed())
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{
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char ch = keyPad.getChar(); // note we want the translated char
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int key = keyPad.getLastKey();
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Serial.print(key);
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Serial.print(" \t");
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Serial.println(ch);
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delay(100);
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}
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}
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// -- END OF FILE --
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